Also Called: Benzoic acid, 2-hydroxy-5-[[4-[[[[2-methoxy- 4-[(3-sulfophenyl)azo]phenyl]amino]carbonyl]amino ]phenyl]azo]-, disodium salt;Benzoic acid, 2-hydroxy-5-[[4-[[[[2-methoxy-4-[(3-sulfophenyl)azo]phenyl]amino]carbonyl]amino]phenyl]azo]-, disodium salt;Benzoic acid, 2-hydroxy-5-[2-[4-[[[[2-methoxy-4-[2-(3-sulfophenyl)diazenyl]phenyl]amino]carbonyl]amino]phenyl]diazenyl]-, sodium salt (1:2)